Maybe I’m vastly over-simplifying it but the way I am interpreting that is to say that even if all of the universe has decayed to heat radiation, that radiation will continue to be further disbursed with the expansion of the universe. So the maximum amount of entropy (amount of dispersal) does always continue to increase. But I don’t think disbursed heat radiation could perform any computation.
Maybe I’m vastly over-simplifying it but the way I am interpreting that is to say that even if all of the universe has decayed to heat radiation, that radiation will continue to be further disbursed with the expansion of the universe. So the maximum amount of entropy (amount of dispersal) does always continue to increase. But I don’t think disbursed heat radiation could perform any computation.